HELP PLEASE WITH THESE TWO QUEDTIONS I’LL MARK BRAINLIEST AND GIVE 100 PTS

1. Jim is a furniture salesman. His weekly pay is $300 plus 3.5% of his total sales for the week. Jim sells x dollars' worth of furniture during the week. Write a function, p(x), which can be used to determine his pay for the week. Use this function to determine Jim's pay to the nearest cent for a week when his sales total is $8250.

2. Antonio started the question 2x+1=11 by writing 2x=10. Which property justifies this step?

(1) Commutative property of addition
(2)Distributive property of multiplication over addition
(3)Addition property of equality
(4)Subtraction property of equality